<template>
      <li>
        <label>
            <input type="checkbox" :checked="todo.done" @change="handleCheck(todo.id)"/>
            <input type="checkbox" v-model="todo.done"/>
            <span v-show="!todo.isEdit">{{todo.title}}</span>
            <input v-show="todo.isEdit" 
            type="text" 
            :value="todo.title" 
            @blur="handleBlur(todo,$event)"
            ref="inputTitle">
        </label>
        
        <button class="btn btn-danger" @click="deleteItem(todo.id)">删除</button>
        <button  v-show="!todo.isEdit" class="btn btn-edit" @click="editItem(todo)">编辑</button>
      </li>
</template>

<script>
    import PubSub from 'pubsub-js';
    export default {
        name:'MyItem',
        props:['todo'],
        methods:{
          handleCheck(id){
            //通知App组件将对应对象的done取反
            //this.checkTodo(id)
            this.$bus.$emit('checkTodo',id);
          },
          deleteItem(id){
            // if(confirm('确定删除吗')){
            //   //通知App删除
            //   //this.deleteTodo(id)
            //   this.$bus.$emit('deleteTodo',id);
            // }
            PubSub.publish('deleteTodo',id)
          },
          editItem(todo){
            if (todo.hasOwnProperty('isEdit')) {
              todo.isEdit = true
            }else{
              this.$set(todo,'isEdit',true)
            }
            // todo.isEdit = true
            this.$nextTick(function(){
              this.$refs.inputTitle.focus()
            })
          },
          //失去焦点回调
          handleBlur(todo,e){
            todo.isEdit = false
            //console.log('updateTodo',todo.id,e.target.value);
            this.$bus.$emit('updateTodo',todo.id,e.target.value)
          },
        }
    }
</script>

<style scoped>
  /*item*/
  li {
    list-style: none;
    height: 36px;
    line-height: 36px;
    padding: 0 5px;
    border-bottom: 1px solid #ddd;
  }

  li label {
    float: left;
    cursor: pointer;
  }

  li label li input {
    vertical-align: middle;
    margin-right: 6px;
    position: relative;
    top: -1px;
  }

  li button {
    float: right;
    display: none;
    margin-top: 3px;
  }

  li:before {
    content: initial;
  }

  li:last-child {
    border-bottom: none;
  }

  li:hover{
    background-color: #ddd;
  }
  li:hover button{
    display:block;
  }


</style>